#注释
print('123', end=" ")#消除回车
print('456')
num1 = 10
print(bin(num1))#2进制
print(oct(num1))#八进制
print(int(num1))#十进制
print(float(num1))#转浮点型数据
print(10//5)#整除
print(2**3)#2的三次方，次方
print( 3 > 2 and 1 < 10)# or not and 不识别符号